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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

substance go
a particular kind or species of matter with uniform properties

poison, toxicant, poisonous substance go
any substance that causes injury or illness or death of a living organism

toxin
a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species

noun.substance

10 Subcategories

ricin, ricin toxin go
a toxic protein extracted from castor beans
animal toxin, zootoxin go
a toxin resembling bacterial toxins in its antigenic properties that is found in the fluids of certain animals
bacterial toxin go
any endotoxin or exotoxin formed in or elaborated by bacterial cells
cytotoxin go
any substance that has a toxic effect on cells
endotoxin go
a toxin that is confined inside the microorganisms and is released only when the microorganisms are broken down or die
exotoxin go
a toxin that is secreted by microorganisms into the surrounding medium
hepatotoxin go
any toxin that affects the liver
nephrotoxin go
any toxin that affects the kidneys
neurotoxin, neurolysin go
any toxin that affects neural tissues
plant toxin, phytotoxin go
any substance produced by plants that is similar in its properties to extracellular bacterial toxin